Mining vehicle

The invention relates to a mining vehicle and to a method of connecting a mining vehicle. The mining vehicle comprises a carriage, driving equipment for moving the carriage and a DC bus for supplying the driving equipment. The mining vehicle is connected to an external DC trolley line. There is an electrical switching means between the DC bus of the mining vehicle and the external DC trolley line. The electrical switching means is arranged to adapt the polarity of the external DC trolley line to be suitable for the DC bus of the mining vehicle.